Can I regrout over existing grout

[colo]

Hello,
I have just had my bathroom done 2 days ago by a professional tiler. When he has finished the grouting it looks like he has washed too much grout out of the joints.

Will it be OK to go back over it with fresh grout.

The grout is a good quality flexible grout and the tiles are rectified porcelain.

Thanks for any help

[Ktuludays]

Why not get the pro back to rectify?

Sent from my HUAWEI VNS-L31 using Tapatalk

[colo]

Why not get the pro back to rectify?

Sent from my HUAWEI VNS-L31 using Tapatalk

Every time I ring he is always mad busy and it will be weeks before he will come back. I would rather do it myself.

[Ktuludays]

Put some pics up so we can better see what you've got

Sent from my HUAWEI VNS-L31 using Tapatalk

[Rorschach]

Get him to fix it, its what you are paying for.

[decdec22]

To echo what a lot of people have been saying, get the pro back in.

To answer your original question, it is best to remove the old grout and apply new grout since it can be uneven in some areas. When I was grouting my walls this video helped me.

Let me know how it goes!

Edit: forgot the link https://www.youtube.com/watch?v=42J8B6m8JA8